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Tampa Home Wash · Common Exterior Problems
Black Streaks on Gutters: What They Are & How to Remove Them
Dark lines on the outside of your gutters? They are called tiger stripes. Here is why they show up and why a normal wash does not remove them.
Send us a photo and we will tell you what we see and what it will take.
Quick answerSafe removal tips
Tiger stripes are not mold. They are a dirt film stuck to the gutter.
Quick Answer: What Are the Black Stripes on My Gutters?
They are called tiger stripes. Dirt, soot, and grime from the roof wash over the edge of the gutter and stick to the outside. Over time the gutter’s finish wears and gets slightly sticky, so the dirt grabs on and leaves dark stripes. A normal wash or hose usually will not remove them.
Why Gutters Get Tiger Stripes
Water Over the Edge
Rain runs over the front lip of the gutter and drags dirt down the side.
Worn Finish
As the paint gets older, it holds onto dirt more easily.
Roof and Air Dirt
Dust, pollen, and soot from the roof and air ride along with the rain.
Clogged gutters make it worse, because more water spills over the front instead of flowing to the downspout.
Is It the Same as Black Streaks on the Roof?
No. Black streaks on a roof are usually algae, a living growth. Gutter tiger stripes are mostly a dirt film stuck to the paint. They need different cleaning. Read about black streaks on roofs in Tampa.
How Tiger Stripes Are Removed
Because the dirt is stuck to the paint, rinsing alone usually does not work. Tiger stripes are removed with a cleaner made for gutters and gentle scrubbing, then a good rinse. The goal is to lift the film without scratching or stripping the gutter’s paint.
- Clean out the gutters so water stops spilling over the front.
- Use a gutter cleaner, not harsh scrub pads.
- Work from a safe spot. Ladders are a common cause of falls.
What Not to Do
- Do not use steel wool or rough pads. They scratch the paint.
- Do not blast gutters with high pressure. It can dent them or push water under the roof edge.
- Do not lean a ladder on the gutter. It can bend it.
How to Keep Tiger Stripes Away
Keep Gutters Clear
Clean gutters do not overflow as much.
Clean Stripes Early
Light stripes come off easier than old ones.
Wash With the House
Add gutters when you get your house washing done.
Why Tampa Gutters Get Stripes So Fast
Tampa gets a lot of hard summer rain, most of it from late May to early October. Each storm fills the gutters fast, and some water spills over the front edge. That water carries roof dirt, pollen and tiny bits of shingle grit with it.
Then the sun bakes it on. Aluminum gutters also build up a thin chalky layer as the paint ages, and dirt sticks to that layer like tape. That is why the stripes look like they are part of the paint.
- Homes under oak or pine trees get stripes faster.
- Gutters that clog spill over more, so they stripe more.
- White and light colors show stripes the most. Dark gutters hide them better.
Should You Clean Them Yourself?
Some light stripes come off with a soft brush and a gentle cleaner. Heavy stripes usually need a special gutter cleaner and careful hand work. Here is a simple way to decide.
| Situation | Do It Yourself? | Why |
|---|---|---|
| One-story home, light stripes | Often yes | A soft brush and mild soap from a safe step ladder may do it |
| Two-story home | Better to call a pro | Ladder work up high is risky |
| Stripes that will not wipe off | Call a pro | They need a gutter-safe cleaner and hand scrubbing |
| Old, chalky paint | Be careful | Scrubbing too hard can wear the paint thin |
Never use a pressure washer on gutters. It can dent the metal and blast water up under the roof edge.
What Does It Cost?
Gutter stripe cleaning is usually priced after we look at your home. The price depends on how many feet of gutter you have, how high they are and how deep the stripes go.
Many homeowners add it to a soft house wash, since the ladders and setup are already there. Send us a photo and we will tell you the price before any work starts.
Frequently Asked Questions
What causes black stripes on gutters?
Dirt and grime from the roof wash over the front of the gutter and stick to the paint, leaving dark lines called tiger stripes.
Are tiger stripes mold?
No, not usually. They are mostly a dirt film stuck to the gutter. Roof black streaks are a different thing and are usually algae.
Why does a hose not remove them?
The dirt is bonded to the paint, so plain water slides right over it. It needs a gutter cleaner and gentle scrubbing.
Can pressure washing remove tiger stripes?
High pressure alone often does not, and it can dent gutters or push water under the roof edge. Gentle cleaning works better.
Do clogged gutters cause tiger stripes?
They make them worse. When gutters clog, more water spills over the front and carries more dirt down the side.
Proudly Serving Tampa, FL
Areas we serve include Westchase, South Tampa, Carrollwood and New Tampa.
We clean the black streaks off the outside of gutters on Tampa homes.
If your gutters look striped, the stains can usually be cleaned off without new gutters.
Let us look at it first.
Contact us today for a no obligation estimate and ask about same day or next day availability.
Phone(656) 219-1566
Address7113 Causeway Blvd #1470, Tampa, FL 33619
Emailwashingp66@gmail.com
Service locationTampa, Florida